1 #ifndef _ASM_X86_SMP_H_
2 #define _ASM_X86_SMP_H_
4 #include <linux/cpumask.h>
5 #include <linux/init.h>
6 #include <asm/percpu.h>
9 * We need the APIC definitions automatically as part of 'smp.h'
11 #ifdef CONFIG_X86_LOCAL_APIC
12 # include <asm/mpspec.h>
13 # include <asm/apic.h>
14 # ifdef CONFIG_X86_IO_APIC
15 # include <asm/io_apic.h>
19 #include <asm/thread_info.h>
21 extern cpumask_t cpu_callout_map
;
22 extern cpumask_t cpu_initialized
;
23 extern cpumask_t cpu_callin_map
;
25 extern void (*mtrr_hook
)(void);
26 extern void zap_low_mappings(void);
28 extern int __cpuinit
get_local_pda(int cpu
);
30 extern int smp_num_siblings
;
31 extern unsigned int num_processors
;
32 extern cpumask_t cpu_initialized
;
34 DECLARE_PER_CPU(cpumask_t
, cpu_sibling_map
);
35 DECLARE_PER_CPU(cpumask_t
, cpu_core_map
);
36 DECLARE_PER_CPU(u16
, cpu_llc_id
);
38 DECLARE_EARLY_PER_CPU(u16
, x86_cpu_to_apicid
);
39 DECLARE_EARLY_PER_CPU(u16
, x86_bios_cpu_apicid
);
41 /* Static state in head.S used to set up a CPU */
48 void (*smp_prepare_boot_cpu
)(void);
49 void (*smp_prepare_cpus
)(unsigned max_cpus
);
50 void (*smp_cpus_done
)(unsigned max_cpus
);
52 void (*smp_send_stop
)(void);
53 void (*smp_send_reschedule
)(int cpu
);
55 int (*cpu_up
)(unsigned cpu
);
56 int (*cpu_disable
)(void);
57 void (*cpu_die
)(unsigned int cpu
);
58 void (*play_dead
)(void);
60 void (*send_call_func_ipi
)(cpumask_t mask
);
61 void (*send_call_func_single_ipi
)(int cpu
);
64 /* Globals due to paravirt */
65 extern void set_cpu_sibling_map(int cpu
);
68 #ifndef CONFIG_PARAVIRT
69 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
71 extern struct smp_ops smp_ops
;
73 static inline void smp_send_stop(void)
75 smp_ops
.smp_send_stop();
78 static inline void smp_prepare_boot_cpu(void)
80 smp_ops
.smp_prepare_boot_cpu();
83 static inline void smp_prepare_cpus(unsigned int max_cpus
)
85 smp_ops
.smp_prepare_cpus(max_cpus
);
88 static inline void smp_cpus_done(unsigned int max_cpus
)
90 smp_ops
.smp_cpus_done(max_cpus
);
93 static inline int __cpu_up(unsigned int cpu
)
95 return smp_ops
.cpu_up(cpu
);
98 static inline int __cpu_disable(void)
100 return smp_ops
.cpu_disable();
103 static inline void __cpu_die(unsigned int cpu
)
105 smp_ops
.cpu_die(cpu
);
108 static inline void play_dead(void)
113 static inline void smp_send_reschedule(int cpu
)
115 smp_ops
.smp_send_reschedule(cpu
);
118 static inline void arch_send_call_function_single_ipi(int cpu
)
120 smp_ops
.send_call_func_single_ipi(cpu
);
123 static inline void arch_send_call_function_ipi(cpumask_t mask
)
125 smp_ops
.send_call_func_ipi(mask
);
128 void native_smp_prepare_boot_cpu(void);
129 void native_smp_prepare_cpus(unsigned int max_cpus
);
130 void native_smp_cpus_done(unsigned int max_cpus
);
131 int native_cpu_up(unsigned int cpunum
);
132 int native_cpu_disable(void);
133 void native_cpu_die(unsigned int cpu
);
134 void native_play_dead(void);
136 void native_send_call_func_ipi(cpumask_t mask
);
137 void native_send_call_func_single_ipi(int cpu
);
139 void smp_store_cpu_info(int id
);
140 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
142 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
143 static inline int num_booting_cpus(void)
145 return cpus_weight(cpu_callout_map
);
147 #endif /* CONFIG_SMP */
149 #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
150 extern void prefill_possible_map(void);
152 static inline void prefill_possible_map(void)
157 extern unsigned disabled_cpus __cpuinitdata
;
159 #ifdef CONFIG_X86_32_SMP
161 * This function is needed by all SMP systems. It must _always_ be valid
162 * from the initial startup. We map APIC_BASE very early in page_setup(),
163 * so this is correct in the x86 case.
165 DECLARE_PER_CPU(int, cpu_number
);
166 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
167 extern int safe_smp_processor_id(void);
169 #elif defined(CONFIG_X86_64_SMP)
170 #define raw_smp_processor_id() read_pda(cpunumber)
172 #define stack_smp_processor_id() \
174 struct thread_info *ti; \
175 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
178 #define safe_smp_processor_id() smp_processor_id()
180 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
181 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
182 #define safe_smp_processor_id() 0
183 #define stack_smp_processor_id() 0
186 #ifdef CONFIG_X86_LOCAL_APIC
188 static inline int logical_smp_processor_id(void)
190 /* we don't want to mark this access volatile - bad code generation */
191 return GET_APIC_LOGICAL_ID(*(u32
*)(APIC_BASE
+ APIC_LDR
));
194 #ifndef CONFIG_X86_64
195 static inline unsigned int read_apic_id(void)
197 return *(u32
*)(APIC_BASE
+ APIC_ID
);
200 extern unsigned int read_apic_id(void);
204 # ifdef APIC_DEFINITION
205 extern int hard_smp_processor_id(void);
207 # include <mach_apicdef.h>
208 static inline int hard_smp_processor_id(void)
210 /* we don't want to mark this access volatile - bad code generation */
211 return GET_APIC_ID(read_apic_id());
213 # endif /* APIC_DEFINITION */
215 #else /* CONFIG_X86_LOCAL_APIC */
218 # define hard_smp_processor_id() 0
221 #endif /* CONFIG_X86_LOCAL_APIC */
223 #ifdef CONFIG_HOTPLUG_CPU
224 extern void cpu_uninit(void);
227 #endif /* __ASSEMBLY__ */